Turning-lathe.



TURNING LATHE.

APPLICATION FILED JULY 1, 1907.

EDWARD TANNEWITZ, OF GRAND RAPIDS, MICHIGAN.

TURN ING-LATHE Specification of Letters Patent.

Patented Aug. 11, 1908.

Original application filed May 14, 1906, Serial No. 316,770. Divided andthis application filed July 1, 1907.

Serial No. 381,595.

To all whom it may concern:

Be it known that I, EDWARD TANNEWITZ, citizen of the United States,residing at the city of Grand Rapids, county of Kent, State of Michigan,have invented certain new and useful Improvements in Turning-Lathes, ofwhich the following is a specification.

This invention relates to improvements in turning lathes.

It relates particularly to an improved turning lathe for turning roundrods.

It is frequently the case that stock used for rods, such as spindles,dowels, dowel rods, or the like, is irregular or varying in thickness.This is especially the case when the stock is ripped off from planks.

It is the main object of this invention to provide an improved turninglathe adapted to operate upon such strips of irregular or varyingthickness.

Further objects, and objects relating to details of construction, willdefinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawing, forming a part of thisspecification, in which,

Figure 1 is a longitudinal central section, through a structureembodying the features of my invention, taken on a line corresponding toline 11 of Fig. 2. Fig. 2 is a detail transverse section taken on a linecorresponding to line 2-2 of Fig. 1. Fig. 3 is a detail longitudinalsection through the stock holding sleeve 9, taken on a linecorresponding to line 33 of Fig. 4. Fig. 4 is a cross section thereof,taken on a line corresponding to line 44 of Fig. 3.

In the drawing, the sectional views are taken looking in the directionof the little arrows at the ends of the section lines, and similarnumerals of reference refer to similar parts throughout the severalviews.

Referring to the drawing, 1 represents the frame of the machine which isprovided with bearings 22 for the arbor 3 of the cutter head. The arboris provided with a pulley 4. The arbor 3 is hollow and is interiorlythreaded at its forward end to receive the cutter head 5. The cutterhead is provided with a conical mouth or chamber 6 at its inner end intowhich the conical delivery end 10 of the work holder 9 projects.

The mouth 6 of the cutter head is extended or continued into acylindrical work support 7. The stock holder 9 is arranged through thehollow arbor 3 of the cutter head, and is supported at its outer end bythe bracket 15 on the frame, the work holder being provided at its rearend with a hub-like enlargement 14, adapted to fit into the bracket andthereby rigidly support the work holder. The Work holder is providedwith a longitudinal stock opening 11, the stock opening being oblong incross section and out of center with the holder sleeve 9, so that theopening is out of center with the cutter head. VVithin the stock openingis a blade spring 12 se cured to the wall thereof by a suitable rivet,as 13, the spring being secured at its rear end, and its free endprojecting forwardly to the delivery end of the work holder. This springholds the stock downwardly in the work holder, so that it is properlycentered and delivered to the cutter head. As the work holder extendsinto the cutter, it is supported practically to the point where it isacted upon by the cutter head, so that it is not likely to be twistedoff, although it may be of small diameter. This enables the working upof cross grain trash or shaky stock and also of short pieces. The workholder is adapted to receive strips of varying thickness, and thus thenecessity of running them through a sizing saw is obviated.

The structure is very simple and at the same time is entirely efiectivefor the purose. p Having thus described my invention, what I claim asnew and desire to secure by Letters Patent is:

1. In a turning lathe, the combination of a revolubly mounted cutterhead having a conical mouth at its rear end and a cylindrical worksupport at its forward end; a non-revoluble stock holder having aconical delivery end arranged in the said conical mouth of said cutterhead, and a stock opening therethrough, said stock opening being oblongin cross section and having two opposed sides spaced to correspond toone cross dimension of the stock; and a blade spring arr. nged in saidstock opening of said stock holder with its rear end secured to the wallthereof and its free end extending forwardly to the delivery end of thestock-holder and acting parallel to said op osed sides and towards anintermediate fiXed side, said cutter head and work support beingcentered relative to that portion or the stock opening described by asquare having dimensions equal to the distanee between the said opposedsides, the said opposed sides and said mtermediate fixed side forminthree sides of the square, whereby stock 0% varying width is roperlycentered and supported to be acted upon by said cutter head.

2. In a turning lathe, the combination of a cutter head; a stock holderhaving a stock opening therethrough, said stock opening be ing oblong incross section and having two opposed sides spaced to correspond to onecross dimension of the stock; and a blade spring arranged in said stockopening of said stock holder with its rear end secured to the wallthereof and its free end extending forwardly to the delivery end of thestockholder and acting parallel to said opposed sides and towards anintermediate fixed side, said opposed and said intermediatesides formingunyielding supports for the stock.

3. In a turning lathe, the combination of 'a mounted cutter head; astock holder having a stock opening therethro ugh, said stock openingbeing oblong in cross section and having two opposed sides spaced tocorrespond to one cross dimension of the stock; and a spring arranged insaid stock opening of said stock holder, to act parallel to said opposedsides and towards an intermediate fixed side, said opposed andintermediate sides forming unyielding supports for the stock.

In witness whereof, I have hereunto set my hand and seal in the presenceof two witnesses.

EDWARD TANNEWITZ. [1,. s.]

Witnesses:

JOHN MULDER, Jos. O. BELLAIR.

